We received the following message from MoodleRooms:
Moodlerooms identified an issue with your site’s session servers that was causing them to behave erratically and unexpectedly log users out of the system. An emergency restart of those session servers was required to prevent the premature termination of sessions on your site. The restart occurred on August 27th at 3pm ET (12pm PT) and caused all users to be logged out. After the restart, users are able to log in again and their sessions will follow the expiration settings configured in your Joule site.
If you were on the site when this occurred, our apologies for any inconvenience it may have caused you.